Home / 18,989.90-28,476.19-7,889.96

Finding the Fourth Proportional to 18,989.90, 28,476.19 and 7,889.96

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Solution

The fourth proportional to 18,989.90, 28,476.19 and 7,889.96 is: 11,831.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.90 : 28,476.19 = 7,889.96 : x
  2. Step 2: Convert to fraction form
    18,989.90/28,476.19 = 7,889.96/x
  3. Step 3: Cross multiply
    18,989.90x = 28,476.19 × 7,889.96
  4. Step 4: Simplify right side
    18,989.90x = 224,676,051.52
  5. Step 5: Solve for x
    x = 224,676,051.52/18,989.90
  6. Step 6: Final answer
    x = 11,831.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.